||This article is about a/an voice actor in the Super Sentai series.
Mitsuo Yamaguchi (山口 光雄 Yamaguchi Mitsuo?), better known by his stage name of Kappei Yamaguchi (山口 勝平 Yamaguchi Kappei?), is a Japanese voice actor and actor.
As a voice actor, he is best known for the roles of Ranma Saotome (Ranma ½), InuYasha (InuYasha), L (Death Note), Usopp (One Piece), and Kaito Kid and Shinichi Kudo (Detective Conan).
In Super Sentai, he had various roles. Notably, he provided voices for Ticket and ToQger Equipment Voice in Ressha Sentai ToQger. He also served as narrator for the said series.